<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <!-- 导入依赖 -->
    <script src="https://lib.baomitu.com/leaflet/1.9.2/leaflet.js"></script>
    <link rel="stylesheet" href="https://lib.baomitu.com/leaflet/1.9.2/leaflet.css">
    <style>
        * {
            margin: 0;
            padding: 0
        }

        #map {
            width: 100vw;
            height: 100vh;
        }
    </style>
</head>

<body>
    <div id="map">

    </div>
    <script>
        /* 加载瓦片地图 */
        var url = 'https://api.mapbox.com/styles/v1/mapbox/streets-v11/tiles/{z}/{x}/{y}?access_token=pk.eyJ1IjoiY2hlbmdiZW5jaGFvIiwiYSI6ImNsODU3aGRiODA0Y2UzcHBzZmFlcmdqZ2sifQ.8k59W_pB_Riwe6o-MneRlA'
        var layer = L.tileLayer(url, {
            maxZoom: 19,
            attribution: '© OpenStreetMap'
        })
        const map = L.map("map", {
            layers: [layer],
            /* center:[纬度,经度] */
            center: [30.50, 114.30],
            zoom: 4
        })

        // 图层切换：
        let show = true;
        map.on("click", () => {
            show = !show;
            /* if (!show) {
                // ！这两种方法都是彻底清除，从地图中移除图层（移除后就没有了，还需再添加回来）
                layer.remove();
                // map.removeLayer(layer)
            } else {
                map.addLayer(layer);
            } */
            if(!show){
                // ！这种方法只是设置透明度，设置多少都行，图层还在，只是透明度的变化
                layer.setOpacity(0)
            }else{
                layer.setOpacity(1)
            }
        })
    </script>
</body>

</html>